diff --git a/Core/InternalModule.php b/Core/InternalModule.php
index 3318c20..20c5f12 100644
--- a/Core/InternalModule.php
+++ b/Core/InternalModule.php
@@ -281,9 +281,10 @@ public function checkExtendedClasses()
                          * we don't need to check for filesystem directory - we only use namespaces in version 2.0
                          */
                         if ($this->isMetadataVersionGreaterEqual('2.0')) {
-                            if (!isset($aResult[ $sClassName ][ $sModuleName ]) && strpos($sModuleName, $moduleNameSpace) === 0) {
+                            if ($moduleNameSpace && !isset($aResult[$sClassName][$sModuleName]) && strpos($sModuleName,
+                                    $moduleNameSpace) === 0) {
                                 $this->stateFine = false;
-                                $aResult[ $sClassName ][ $sModuleName ] = -1;
+                                $aResult[$sClassName][$sModuleName] = -1;
                             }
                         } else {
                             if (!isset($aResult[ $sClassName ][ $sModuleName ]) && strpos($sModuleName, $sModulePath . '/') === 0) {
diff --git a/README.md b/README.md
index e26032f..2377adf 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,7 @@ composer require oxid-community/moduleinternals
 ![OXID_moduleinternals](screenshot.png)
 
 ## Changelog
+* 2018-12-12  1.5.2 avoid php warning if module namespace can not be found
 * 2018-11-23  1.5.1 avoid error when fixing deactive module that has controllers
 * 2018-11-23  1.5.0 do not scan deactivated modules
 * 2018-11-23  1.4.3 fix error (modullist not shown, if oxid console is not installed)
diff --git a/metadata.php b/metadata.php
index 26fa0c1..29c3b37 100644
--- a/metadata.php
+++ b/metadata.php
@@ -49,7 +49,7 @@
     Komplette Übersicht: '.$sLinkAndText,
     ],
     'thumbnail'   => 'module_internals.png',
-    'version'     => '1.5.1',
+    'version'     => '1.5.2',
     'author'      => 'OXID Community',
     'url'         => 'https://github.com/OXIDprojects/oxid-module-internals',
     'email'       => '',